140-150 hp in GSX1100 -82

[Powerwheelie]

Please let me know your best recepie on how To get 140-150 hp out of à gsx1100 -82 in the cheapest way.
How much cubik?
What type of carburators?
What type of cams?

Also happy To get tips on were To buy the stuff to à good price?

[loud et]

typically first posts should be made in the gs owners section to introduce yourself. there we can send you a gs welcome message with lots of gs info.
give it a try! (dont be afraid to put some of your bike pics up while you are there!

[Tim Tom]

Get in touch with one of several members here that drag races with the big GS. They will know everything you could every want to know and more. I can only assume you want that much power for drag racing? It is completely unnecessary for street riding.

Also be prepared to lay out some money for the primo parts.

[bellucci]

Like the previous posts said, is this for racing or street? There are a lot of smart people on this site. Tell them what you want to do, and they will give you the map. I have a 1327 with about 150hp now. It was 180, but changed the cams... A real handfull on the street. On the track, its working well. Probably $4k originally invested... As far as how big, Ray likes 1400cc low compression bulletproof with mild cams. Others might come along and give you some opinions... Tell people where you live in your signature line. That will help...
Curt

[blowerbike]

bad year with the crank issues.
buy an 1150 engine...add drop in cams and a set of rs36 miks.
with a good tune up you'll be around 130hp and really happy and bullet proof.
bottom line i doubt the OP will spend the cash it takes to do it right.
buy a gen 1 busa for 4500 bucks and go really fast.

[chef1366]

See below \/\/\/\/
Oh and an 1150 crank drops right in but you will need an 1150 clutch basket. You will also need a big end crank starter clutch and charging rotor.

[bellucci]

Boy did this thread die... And I thought it would be an interesting read...
Curt

[Ecklund]

Get in touch with one of several members here that drag races with the big GS. They will know everything you could every want to know and more. I can only assume you want that much power for drag racing? It is completely unnecessary for street riding.

Also be prepared to lay out some money for the primo parts.

Really,? Unnecessary?

That line of thinking would lead one to say that 250s provide all the power one would need, making most of our bikes 'unnecessary'.

From what I've read from many long time contributors to this site is that the posters desired power levels can be reached with relatively modest engine mods and be very street able.

My '81 1100e is pretty much sorted out and a 1229 sounds like a good project the next winter after I have a mission break. Should be close to my ZRX in performance.

[Nessism]

Really,? Unnecessary?

That line of thinking would lead one to say that 250s provide all the power one would need, making most of our bikes 'unnecessary'.

From what I've read from many long time contributors to this site is that the posters desired power levels can be reached with relatively modest engine mods and be very street able.

My '81 1100e is pretty much sorted out and a 1229 sounds like a good project the next winter after I have a mission break. Should be close to my ZRX in performance.

Yes, really.

Nobody NEEDS 140 hp in a street driven motorcycle, but they may WANT it, which is a completely different matter. And NO, a 250 is not adequate for general use if that included extended freeway and two up riding.

I'm not qualified to state with conviction all that would be needed to achieve that kind of HP, but I do know you would need a welded crank, HD clutch hub, big carbs, performance cams, and most likely big displacement and a worked head. In addition, an oil cooler should be added, and of course, a good exhaust system too.

With all that HP you would likely want a rear wheel/tire with a little more meat than the stock 130 so now you are into a wheel conversion project as well. Of course, now that brings up the inadequate suspension matter... Get the idea? Big project, and expensive.

[Tim Tom]

Really,? Unnecessary?

That line of thinking would lead one to say that 250s provide all the power one would need, making most of our bikes 'unnecessary'.

From what I've read from many long time contributors to this site is that the posters desired power levels can be reached with relatively modest engine mods and be very street able.

I never said a 250 could provide all the power one needed. Unless you are a new rider, or a featherweight. That is an extreme, just like having 150 horses occupies the other end of the scale.

Sure the modifications can be done. You can do a big bore kit, hotter cams, bigger carbs welded crank, etc. The power is achievable. HOWEVER if you are gonna make a bike GO you need to make it HANDLE and STOP better too. So you do a roller swap. Throw on a GSXR/ Bandit suspension and wheels. OK. That is perfectly fine and doable.

Now by this point you have put how many thousands of dollars into your previously inexpensive GS? Way more than you could EVER get back on a resell that's for sure. If you think you are going to keep the GS forever and you can convince yourself it's worth it to have the biggest and baddest classic muscle bike. Cool. Go for it.

But how often will you actually be using all that power you put in on the street? Unless you are constantly screaming around at redline, much of that power you put into the bike is wasted.

For me it is a question of why, not how. Yes it can be done. If you were making it into a retro track destroyer it should be done. For the street and everyday riding, it's simply unnecessary.

Food for thought... The bandit 1200, which is generally a well liked (and considered fairly fast) bike here, only makes some 95 horses or so.

150 hp is entirely not needed.




.

[bellucci]

For some, too much is almost enough...
Curt

[kawfeedave]

Boy did this thread die... And I thought it would be an interesting read...
Curt

I'm pretty sure the guys with the interesting ideas lost interest as soon as they saw the words 'cheapest way' and 'good price' in the original post.

Keep in mind that brand new the stock bike made about 100 hp. To bump that up to 150 hp is a major undertaking as it's a 50% increase in power out of an engine that already makes good HP for it's displacement. There's nothing 'cheap' or 'easy' about it.

Consider the new Corvette ZR1. 6 liters, 600hp (approx), or almost exactly 6 times the size and power of a GS1100. What would you say to a ZR1 guy who was looking to bump his HP up to 900? I would say break out the checkbook, and get ready to write a couple of big ones....

[rapidray]

For some, too much is almost enough...
Curt

THIS!!!!!!!!!!!!!!!!!!!!!!!

Thomas, I emailed you back so you should have a good idea what is required for that kind of power. Yes, there are things you need to do to get that kind of power but they are also things that will make that engine near bullet proof. They will also make it long road trip reliable. Like someone above said, no one NEEDS this kind of power (Yeah RIGHT! If you ever rode something with that kind of power you would know better!!! !!) but no one needs more than ONE motorcycle to ride on the street either. How many on this site only have ONE motorcycle?!!! Ray.

[Big Jay]

[jwhelan65]

Just go buy this and be done...